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Cucumber radish leaves have this color of hair, because of the powder disease, it will be transmitted to other leaves, to clean up in time, spray a little carbendazim or copper hydroxide, can be effectively alleviated.
Planting of the garden.
When growing plants, the first and most important issue to consider is the soil, which you may have already encountered during the design of your garden.
Many of the new garden soils are now directly from construction waste, and many gardens have been planted for many years without any measures to protect the soil and increase soil fertility.
The better the soil fertility, the better it is for the growth of plants. If the topsoil of the plant is okay, but the subsoil has basically lost its fertility and needs to be replaced, then organic fertilizer must be buried, and the more the better.
When I say organic fertilizer, I mean a well-decayed mixture or manure, but it also includes mushroom-like compost and multi-purpose fertilizers. All of these fertilizers not only enhance soil nutrients, but also bind light, sandy soils together while loosening heavy soils.
In addition, the acidity and alkalinity of the soil must be determined, as different soil qualities will determine what kind of plants it is suitable for. Acidic soils are suitable for the growth of rhododendrons, such as rhododendrons and camellia. Alkaline soils are suitable for the growth of flowers such as clematis, drunken fish grass and carnations.
Neutral soils, on the other hand, can be used to grow a wide range of flowers. To determine the pH of the soil, you just need to buy some test materials.
There's also the big problem that irrigation water has different pH levels in different places, unless you have a bucket of stagnant water (because the rain is neutral), which is something that every gardener encounters. My advice is to plant according to the location, choose the right plants according to the nature of the soil, and let nature do its job. It would be unwise to let plants struggle to survive in an unsuitable soil environment.
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Cucumbers, carrots are fine, why not tomatoes? What is the meaning?
Could you please make your question clear so that people can understand what you are trying to say. Otherwise, others will not be able to ask your questions.
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Cucumber leaves should be thick and dark in color, pay attention to reasonable fertilization, how to fertilize cucumbers:
1. Before planting to sit melons, seedlings should be topdressed, and the amount should be controlled.
In the early stage of cucumber growth (generally within one month after planting), the soil temperature is still low, if fertilization or watering is too much, "rotten roots" will occur, which is due to the weak activity of the root system and the inability to fully absorb, resulting in excessive soil water accumulation, reduced air, and suffocation and rotting of the roots; The aboveground part is characterized by thin mesophyll, not bright leaf color, and easy wilting. Therefore, cucumbers can not be fertilized at one time, watered too much, and the topdressing method of "thin fertilizer is applied frequently, a small amount of meals" should be applied.
2. In addition to the application of sufficient and effective top dressing, a large number of chemical fertilizers should also be applied.
Cucumber is a vegetable with very shallow roots and a very large amount of fertilizer, and in the process of growth, top dressing should be increased from the young fruit stage to the harvest period to promote its growth and development and the nutrient demand for fruit expansion period. Shed cucumber topdressing do not planing ridges or ditching dry application, must be applied with the ditch, generally each topdressing amount is not too much, the average cucumber chase per plant is appropriate, in the peak period of picking cucumbers, each watering should be mixed with fertilizer water, so that it does not produce fertilizer damage, but also can obtain high yield. In the middle and late stages of cucumber growth, when the leaves are found to be thin and yellow, 50 grams of urea mixed with 15 kg of water, fully stirred and dissolved, and then sprayed on the leaves, once every 5 7 days, 3 5 times in a row.
When it is found that the melon is serious or deformed, 50 grams of potassium dihydrogen phosphate mixed with 15 kg of water are sprayed on the foliar surface once every 3 5 days. In the later stage of production, the roots senesce, and urea can be used at the same time.
Three. Foliar top dressing is a cost-effective way to top dress.
Cucumbers can absorb nutrients not only from the soil by the roots, but also from the foliage to promote fruit development. Generally, in the middle and late stages of production, when the leaves are found to be thin and yellow, nitrogen fertilizer is applied with 50 grams of urea to 15 kg of water after full stirring and dissolving, and the foliar surface is sprayed every 5 days 7 days 1 time in a row 3 times 5 times, the effect is very good. When it is found that the melon is serious, the melon leaves are hypertrophied, and there are many deformed melons, 50 grams of potassium dihydrogen phosphate are stirred and dissolved with 15 kg of water, and then sprayed on the foliar surface for 3 5 days and sprayed once, which can also receive certain effects.
In the later stage of production, the roots are senescent, and 50 grams of urea and potassium dihydrogen phosphate can be used at the same time to 15 kg of water, and then half a bottle of spraying Shibao can be added, and the leaves can be sprayed after stirring and melting, which can replace the root top dressing, increase the disease resistance of cucumbers, delay senescence and strive for high yield.
4. Do not fertilize the soil when it is wet or hot.
Fertilization in the case of wet soil is easy to cause female flower differentiation, the appearance of deformed melon, resulting in physiological diseases such as leaf drop, flower drop and melon, fertilization under high temperature conditions, plant leaf water evaporation is large, will affect the fertilizer effect. In addition, the fertilization time should be early in the morning or late afternoon.
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